Groundwater

Shanghai and the Pudong District in particular have seen unprecedented development over the past 25 years. The soil the city is built upon, however, has begun to subside recently.
Jun 7, 2013   Global Site Plans - The Grid
The state governments of Missouri and Arkansas are expected to sign an agreement this year to create a watershed and aquifer protection pact geared at controlling water quality from sources that cross state boundaries.
Nov 17, 2008   Arkansas Democrat Gazette
<p>As part of a plan to utilize the city's rainwater and recycle it back to lake Michigan, Chicago has been renovating its 13,00 alleys to become permeable surfaces, where rainwater can soak back into the ground. 40 alleys have been redone so far.</p>
Jun 30, 2008   CNN
<p>The City of Saco, Maine is turning land the federal government once labeled a toxic Superfund site into a hub for hiking, fishing, and recreation.</p>
May 28, 2008   Portland Press Herald